Shock absorber and vehicle with same

Abstract

The utility model provides a shock absorber and a vehicle with the shock absorber, and the shock absorber comprises a cylinder barrel which is provided with a shock absorption cavity, and shock absorption oil is arranged in the shock absorption cavity; the piston rod is movably arranged at the lower end of the cylinder barrel in a penetrating manner and extends into the damping cavity; the piston is arranged at the upper end of the piston rod and is in sealing fit with the inner wall surface of the damping cavity, so that the interior of the damping cavity is divided into a first cavity located above the piston and a second cavity located below the piston; wherein the upper end of the cylinder barrel is connected with a vehicle body, and the lower end of the piston rod is connected with a wheel assembly of the vehicle. According to the technical scheme, the problem that in the prior art, installation operation of a shock absorber is difficult can be effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle technical field, specifically, relate to a shock absorber and have its vehicle. BACKGROUND

[0002] The shock absorber is a key component in the vehicle suspension system, which can control the vibration and impact of the vehicle. Specifically, when the vehicle travels to the uneven road section, the shock absorber can improve the comfort of the ride; when the vehicle turns or changes lanes, the shock absorber can reduce the inclination and swing of the vehicle, and maintain the stability of the vehicle.

[0003] The weight and bulk structure of the existing shock absorber are concentrated at the lower end of the shock absorber, so that the weight of the wheel end is large, which affects the stability of the vehicle during driving and the operation stability of the driver; in addition, the operation of installing the shock absorber to the vehicle is also difficult. SUMMARY

[0004] The main purpose of the utility model is to provide a shock absorber and a vehicle with the same, so as to solve the problem of difficult installation operation of the shock absorber in the related art.

[0005] In order to achieve the above purpose, according to one aspect of the utility model, a shock absorber is provided, which comprises: a cylinder having a damping cavity, a damping oil being arranged in the damping cavity; a piston rod movably penetrating the lower end of the cylinder and extending into the damping cavity; a piston arranged at the upper end of the piston rod and sealingly matched with the inner wall surface of the damping cavity, so as to divide the damping cavity into a first chamber above the piston and a second chamber below the piston; wherein the upper end of the cylinder is used for connecting with the vehicle body, and the lower end of the piston rod is used for connecting with the vehicle wheel assembly.

[0006] Further, the shock absorber further comprises a control structure arranged at the upper end of the cylinder, the control structure being communicated with the first chamber and the second chamber to control the damping force value of the shock absorber during compression and recovery.

[0007] Further, the control structure comprises a mounting seat arranged at the upper end of the cylinder and a control valve arranged on the mounting seat, the control valve having a recovery oil path and a compression oil path, the damping oil in the second chamber being able to flow into the first chamber through the recovery oil path, and the damping oil in the first chamber being able to flow into the second chamber through the compression oil path.

[0008] Further, the control valve comprises a recovery valve and a compression valve arranged separately, the recovery oil path being arranged in the recovery valve, and the compression oil path being arranged in the compression valve.

[0009] Further, the cylinder includes a working cylinder and an oil storage cylinder arranged in a nested manner, the damping chamber is formed in the working cylinder, an oil storage chamber is formed between the working cylinder and the oil storage cylinder, the oil storage chamber is communicated with the second chamber, the mounting seat is provided with a communication chamber communicated with the first chamber, wherein the first end of the recovery oil path is communicated with the communication chamber, and the second end of the recovery oil path is communicated with the oil storage chamber.

[0010] Further, the control structure further includes an accumulator arranged on the mounting seat, the accumulator has an accumulator chamber and a floating piston arranged in the accumulator chamber and in sealing connection with the inner wall surface of the accumulator chamber, the floating piston divides the accumulator chamber into a closed third chamber and a fourth chamber communicated with the communication chamber, and the third chamber is provided with accumulator fluid.

[0011] Further, the control structure includes an oil sending pump, the oil sending pump has a compression working state and a recovery working state, when the oil sending pump is in the compression working state, the oil sending pump pumps the damping oil in the first chamber into the second chamber, and when the oil sending pump is in the recovery working state, the oil sending pump pumps the damping oil in the second chamber into the first chamber.

[0012] Further, the control structure further includes a mounting seat arranged at the upper end of the cylinder, the mounting seat is provided with a communication chamber communicated with the first chamber, the cylinder includes a working cylinder and an oil storage cylinder arranged in a nested manner, the damping chamber is formed in the working cylinder, an oil storage chamber is formed between the working cylinder and the oil storage cylinder, the oil storage chamber is communicated with the second chamber, and the control structure further includes a first oil pipe communicated between the communication chamber and the oil sending pump and a second oil pipe communicated between the oil storage chamber and the oil sending pump.

[0013] Further, the shock absorber further includes an elastic reset member sleeved outside the cylinder and the piston rod, the upper end of the elastic reset member is fixedly connected with the cylinder, and the lower end of the elastic reset member is fixedly connected with the piston rod.

[0014] According to another aspect of the present application, a vehicle is provided, which includes a vehicle body, a wheel assembly arranged below the vehicle body, and a shock absorber connected between the vehicle body and the wheel assembly, wherein the shock absorber is the shock absorber described above.

[0015] The technical scheme of the utility model discloses a shock absorber, which comprises a cylinder, a piston rod arranged in the cylinder and a piston arranged on the upper end of the piston rod, when the vehicle runs on uneven road surface, the piston rod and the piston move up and down to make the oil flow between the first chamber and the second chamber, and the shock absorption is realized, wherein the cylinder with large volume and weight is arranged on the upper side, the piston rod is arranged in the lower end of the cylinder, the upper end of the shock absorber has large volume and weight, the lower end of the shock absorber has small volume and light weight, and the weight of the wheel end of the vehicle is reduced during the running of the vehicle, the running of the vehicle is more smooth, and the operation of the driver is more stable, in addition, when the shock absorber is installed on the vehicle, the installation operation is easier, and the technical scheme of the utility model can effectively solve the problem of difficult installation operation of the shock absorber in the related art. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the present application, and together with the description of the present application, serve to explain the present application.

[0017] Figure 1 A perspective structural schematic view of the shock absorber according to the embodiment of the utility model is shown;

[0018] Figure 2 A sectional view schematic view of the shock absorber of Figure 1 is shown;

[0019] Figure 3 An enlarged view of the shock absorber of Figure 2 at A is shown;

[0020] Figure 4 A sectional view schematic view of the shock absorber of Figure 1 from another angle is shown;

[0021] Figure 5 An oil circuit diagram of the shock absorber of Figure 1 when the shock absorber is actively recovered by the oil pump is shown;

[0022] Figure 6 An oil circuit diagram of the shock absorber of Figure 1 when the shock absorber is actively compressed by the oil pump is shown;

[0023] Figure 7 An oil circuit diagram of the shock absorber of Figure 1 when the shock absorber is passively recovered is shown;

[0024] Figure 8 An oil circuit diagram of the shock absorber of Figure 1 when the shock absorber is passively compressed is shown.

[0025] In the above drawings, the following reference signs are included:

[0026] 100, damping chamber; 101, first chamber; 102, second chamber;

[0027] 200, oil storage chamber;

[0028] 300, communication chamber;

[0029] 400, energy storage chamber; 401, third chamber; 402, fourth chamber;

[0030] 10, cylinder barrel; 11, working cylinder; 111, communication hole; 12, oil storage cylinder; 13, guide seat; 14, oil seal;

[0031] 20, piston rod; 21, rod body; 22, mounting portion;

[0032] 30, piston;

[0033] 40, control structure; 41, mounting seat; 42, control valve; 421, restoring valve; 422, compression valve; 43, accumulator; 431, floating piston; 44, oil sending pump; 45, first oil pipe; 46, second oil pipe;

[0034] 50, elastic restoring member; 51, spring; 52, upper spring seat; 53, lower spring seat. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0036] It should be noted that the terms used herein are only for the purpose of describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and furthermore, it should be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.

[0037] The relative arrangement of parts and steps, numerical expressions, and values set forth in the Examples are not intended to limit the scope of the present application unless otherwise specifically stated. Also, it is to be understood that the dimensions of the various parts shown in the drawings are not drawn to scale for the sake of convenience. Techniques, methods, and equipment known to those with ordinary skill in the relevant art can not be discussed in detail unless specifically stated. In all of the examples shown and discussed herein, any specific values are to be interpreted as merely exemplary and not limiting. Thus, other examples of the exemplary embodiments can have different values. It is to be noted that like numbers and letters refer to like elements throughout the several views of the drawings, and that the discussion of one view does not imply a similar view of another view unless explicitly discussed.

[0038] As Figures 1 to 4 shown, the present application provides a shock absorber, and embodiments of the shock absorber of the present application include a cylinder 10, a piston rod 20, and a piston 30. The cylinder 10 has a shock absorbing cavity 100, and shock absorbing oil is arranged in the shock absorbing cavity 100; the piston rod 20 is movably arranged at the lower end of the cylinder 10 and extends into the shock absorbing cavity 100; the piston 30 is arranged at the upper end of the piston rod 20 and sealingly cooperates with the inner wall surface of the shock absorbing cavity 100 to divide the shock absorbing cavity 100 into a first chamber 101 above the piston 30 and a second chamber 102 below the piston 30; wherein the upper end of the cylinder 10 is connected to the vehicle body of the vehicle, and the lower end of the piston rod 20 is connected to the wheel assembly of the vehicle.

[0039] By applying the technical solution of the present embodiment, the shock absorber includes the cylinder 10, the piston rod 20 arranged in the cylinder 10, and the piston 30 arranged at the upper end of the piston rod 20. When the vehicle travels on uneven road surface, the piston rod and the piston move up and down to make the oil flow between the first chamber 101 and the second chamber 102, thereby achieving shock absorption. In this embodiment, the cylinder 10 with large volume and weight is arranged at the upper end, and the piston rod 20 is arranged at the lower end of the cylinder 10, so that the upper end of the shock absorber has large volume and weight, and the lower end of the shock absorber has small volume and weight, thereby reducing the weight of the wheel end of the vehicle during driving, making the driving of the vehicle more smooth, and making the operation of the driver more stable. In addition, when the shock absorber is installed on the vehicle, the installation operation will also be easier. Therefore, the technical solution of the present embodiment can effectively solve the problem of difficult installation operation of the shock absorber in the related art.

[0040] As Figures 1 to 4As shown, the shock absorber further comprises a control structure 40 arranged at the upper end of the cylinder tube 10, the control structure 40 being in communication with both the first chamber 101 and the second chamber 102 to control the damping force value of the shock absorber during compression and recovery. By arranging the control structure 40, the recovery damping force value and the compression damping force value during the working process of the shock absorber are controlled, and the working performance of the shock absorber is improved. In addition, arranging the control structure 40 at the upper end of the cylinder tube 10 can further reduce the weight and volume of the lower end of the shock absorber, avoiding affecting the stability of vehicle driving and the speediness during the installation process of the shock absorber.

[0041] As shown in Figures 1 to 4 , Figure 7 and Figure 8 , the control structure 40 comprises a mounting seat 41 arranged at the upper end of the cylinder tube 10 and a control valve 42 arranged on the mounting seat 41, the control valve 42 having a recovery oil passage and a compression oil passage, the shock absorbing oil in the second chamber 102 being able to flow into the first chamber 101 through the recovery oil passage, and the shock absorbing oil in the first chamber 101 being able to flow into the second chamber 102 through the compression oil passage. The control valve 42 can control the flow area of the recovery oil passage and the compression oil passage, thereby realizing the control of the damping force value during the recovery and compression processes of the shock absorber.

[0042] As shown in Figures 1 to 4 , Figure 7 and Figure 8 , the control valve 42 comprises a recovery valve 421 and a compression valve 422 arranged separately, the recovery oil passage being arranged in the recovery valve 421, and the compression oil passage being arranged in the compression valve 422. The recovery valve 421 and the compression valve 422 are arranged independently, thereby making the recovery oil passage and the compression oil passage independent of each other, avoiding mutual influence between the two oil passages, and thereby being able to realize separate conduction of the recovery oil passage, separate conduction of the compression oil passage, or simultaneous conduction of the recovery oil passage and the compression oil passage.

[0043] Specifically, in the present embodiment, the recovery valve 421 and the compression valve 422 are both one-way valves.

[0044] As shown in Figure 1 , Figure 2 , Figure 7 and Figure 8As shown, the cylinder 10 comprises a working cylinder 11 and an oil storage cylinder 12 arranged in a nested manner, a damping chamber 100 is formed in the working cylinder 11, an oil storage chamber 200 is formed between the working cylinder 11 and the oil storage cylinder 12, the oil storage chamber 200 is communicated with the second chamber 102, the mounting seat 41 is provided with a communication chamber 300 communicated with the first chamber 101, wherein the first end of the recovery oil passage is communicated with the communication chamber 300, the second end of the recovery oil passage is communicated with the oil storage chamber 200; the first end of the compression oil passage is communicated with the communication chamber 300, and the second end of the compression oil passage is communicated with the oil storage chamber 200. When the shock absorber is recovered, the damping oil flows from the second chamber 102 to the first chamber 101 in sequence through the oil storage chamber 200, the recovery valve 421 and the communication chamber 300; when the shock absorber is compressed, the damping oil flows from the first chamber 101 to the second chamber 102 in sequence through the communication chamber 300, the compression valve 422 and the oil storage chamber 200.

[0045] As shown in Figure 2 and Figure 3 , the cylinder 10 further comprises a guide seat 13 and an oil seal 14 arranged at the lower end of the working cylinder 11 and the oil storage cylinder 12. When assembling the cylinder 10, first connect the piston rod 20 and the piston 30 together, then assemble into the working cylinder 11, then install the working cylinder 11 and the oil storage cylinder 12 on the mounting seat 41, the central holes of the guide seat 13 and the oil seal 14 penetrate the piston rod 20 and are assembled on the oil storage cylinder 12, and the guide seat 13 and the oil seal 14 are matched with the lower end surface of the working cylinder 11.

[0046] As shown in Figure 3 , a plurality of communication holes 111 are arranged on the cylinder wall of the lower end of the working cylinder 11, and the plurality of communication holes 111 are arranged at intervals along the circumferential direction of the working cylinder 11, so that the second chamber 102 and the oil storage chamber 200 are communicated, and the second chamber 102 is communicated with the recovery valve 421, the compression valve 422 and the oil pump 44 (mentioned later) through the oil storage chamber 200.

[0047] Specifically, as shown in Figure 3 , in addition to the communication chamber 300, a plurality of communication passages are arranged on the mounting seat 41, and the plurality of communication passages respectively communicate the oil storage chamber 200 and the recovery valve 421, the oil storage chamber 200 and the compression valve 422, and the oil storage chamber 200 and the oil pump 44. Due to the above communication relationship, the damping oil fills the damping chamber 100, the oil storage chamber 200, the communication chamber 300 and the oil pump 44.

[0048] As shown in Figure 1 and Figure 4As shown, the control structure 40 further comprises an accumulator 43 arranged on the mounting base 41, the accumulator 43 has an accumulator cavity 400 and a floating piston 431 arranged in the accumulator cavity 400 and sealingly connected with the inner wall surface of the accumulator cavity 400, the floating piston 431 divides the accumulator cavity 400 into a closed third chamber 401 and a fourth chamber 402 in communication with the communication cavity 300, and the third chamber 401 is arranged with an accumulator fluid. Specifically, the accumulator fluid can be nitrogen or other inert gas with compressibility. When the pressure in the first chamber 101 and the communication cavity 300 increases, the excess sealing oil flows into the fourth chamber 402 and presses the floating piston 431, so that the volume of the third chamber 401 becomes smaller and the accumulator fluid in the third chamber 401 is compressed; when the pressure in the first chamber 101 and the communication cavity 300 decreases, the compressed accumulator fluid rebounds and presses the floating piston 431, so that the volume of the fourth chamber 402 becomes smaller and the shock-absorbing oil flows back into the communication cavity 300, thereby providing energy.

[0049] As shown in Figure 4 , the main structure of the accumulator 43 is a high-pressure nitrogen gas storage tank, one end of the high-pressure nitrogen gas storage tank is connected with the mounting base 41 and in communication with the communication cavity 300, the other end of the high-pressure nitrogen gas storage tank is arranged with an end cover, the accumulator cavity 400 is formed inside the high-pressure nitrogen gas storage tank, the floating piston 431 is arranged in the high-pressure nitrogen gas storage tank, the third chamber 401 is formed between the floating piston 431 and the end cover and is filled with high-pressure nitrogen, and the fourth chamber 402 is formed between the floating piston 431 and the mounting base 41 and is in communication with the communication cavity 300.

[0050] As shown in Figure 1 , Figure 5 and Figure 6 , the control structure 40 comprises an oil feeding pump 44, the oil feeding pump 44 has a compression working state and a recovery working state, when the oil feeding pump 44 is in the compression working state, the oil feeding pump 44 pumps the shock-absorbing oil in the first chamber 101 into the second chamber 102; when the oil feeding pump 44 is in the recovery working state, the oil feeding pump 44 pumps the shock-absorbing oil in the second chamber 102 into the first chamber 101. The oil feeding pump 44 can realize active extension or compression of the shock absorber, thereby making the vehicle more easily pass through uneven road surfaces and realize off-road escape, etc.

[0051] As shown in Figure 1 , Figure 5 and Figure 6As shown, the control structure 40 further comprises a mounting seat 41 arranged at the upper end of the cylinder barrel 10, and a communication cavity 300 is arranged in the mounting seat 41 and communicates with the first chamber 101. The cylinder barrel 10 comprises a working cylinder 11 and an oil storage cylinder 12 arranged in a nested manner. The damping cavity 100 is formed in the working cylinder 11. The oil storage cavity 200 is formed between the working cylinder 11 and the oil storage cylinder 12 and communicates with the second chamber 102. The control structure 40 further comprises a first oil pipe 45 communicating the communication cavity 300 and the oil sending pump 44 and a second oil pipe 46 communicating the oil storage cavity 200 and the oil sending pump 44. When the recovery of the shock absorber is realized by the oil sending pump 44, the damping oil flows into the first chamber 101 from the second chamber 102 through the oil storage cavity 200, the oil sending pump 44 and the communication cavity 300 in sequence. When the compression of the shock absorber is realized by the oil sending pump 44, the damping oil flows into the second chamber 102 from the first chamber 101 through the communication cavity 300, the oil sending pump 44 and the oil storage cavity 200 in sequence.

[0052] Specifically, the oil sending pump 44 can be a permanent magnet brushless electric hydraulic internal gear pump. The permanent magnet brushless electric hydraulic internal gear pump is composed of a controller module, a permanent magnet brushless motor and an internal gear pump. In the embodiment, by arranging the recovery valve 421, the compression valve 422 and the oil sending pump 44, the shock absorber can be controlled when high-frequency vibration occurs, and the vehicle comfort is improved.

[0053] In addition, compared with the conventional arrangement in the art, by inverting the shock absorber, the oil sending pump 44, the first oil pipe 45, the second oil pipe 46, the mounting seat 41, the recovery valve 421, the compression valve 422 and the accumulator 43 can be arranged on the vehicle body, the space occupied by the structure at the lower end of the shock absorber can be reduced, and the arrangement of the shock absorber is more convenient.

[0054] The flow direction of the damping oil when the shock absorber works is described below in combination with the drawings:

[0055] Figure 5 The oil circuit diagram when the shock absorber of the embodiment is actively recovered by the oil sending pump 44 is shown. After encountering a pit or passing over a bump, the oil sending pump 44 can actively participate in the recovery of the shock absorber, that is, the shock absorber is actively stretched. At this time, the oil sending pump starts to work in the positive direction, the damping oil flows into the first chamber 101 through the oil sending pump 44, the pressure in the first chamber 101 increases, the piston rod 20 moves downward, the damping oil in the second chamber 102 flows into the oil sending pump 44, and a closed loop is formed. In addition, due to the excessive pressure in the first chamber 101, the floating piston 431 of the accumulator 43 moves to the right to compress the nitrogen and absorb the excess oil pressure.

[0056] Figure 6The oil path diagram of the shock absorber of the embodiment is shown when the shock absorber is actively compressed by the oil pump 44. After encountering a bump or passing through a pit, the oil pump 44 can actively participate in the compression of the shock absorber, that is, the shock absorber is actively compressed. At this time, the oil pump starts to work in reverse, and the shock oil flows into the second chamber 102 through the oil pump 44, so that the pressure inside the second chamber 102 increases, pushing the piston rod 20 to move upward, and the shock oil in the first chamber 101 flows into the oil pump 44, forming a closed loop. At this time, the pressure in the first chamber 101 decreases, and the floating piston 431 of the accumulator 43 moves to the left to release the compressed nitrogen gas to compensate for the missing oil pressure.

[0057] For relatively flat roads, the oil pump 44 can not participate in the compression and recovery of the shock absorber.

[0058] Figure 7 The oil path diagram of the shock absorber of the embodiment is shown when the shock absorber is passively recovered. When the shock absorber is stretched by external force, the pressure of the shock oil in the second chamber 102 increases, and the shock oil flows into the first chamber 101 through the recovery valve 421. At this time, the oil pressure at the upper end of the piston 30 decreases, and the floating piston 431 of the accumulator 43 moves to the left to release the compressed nitrogen gas to compensate for the missing oil pressure.

[0059] Figure 8 The oil path diagram of the shock absorber of the embodiment is shown when the shock absorber is passively compressed. When the shock absorber is compressed by external force, the pressure of the shock oil in the first chamber 101 increases, and the shock oil flows into the second chamber 102 through the compression valve 422. At this time, the oil pressure at the upper end of the piston 30 is large, and the floating piston 431 of the accumulator 43 moves to the right to compress the nitrogen gas to absorb the excess oil pressure.

[0060] As shown in Figures 1 to 3 The shock absorber further includes a resilient return member 50 sleeved outside the cylinder barrel 10 and the piston rod 20. The upper end of the resilient return member 50 is fixedly connected with the cylinder barrel 10, and the lower end of the resilient return member 50 is fixedly connected with the piston rod 20. The resilient return member 50 is used in cooperation with the cylinder barrel 10 and the piston rod 20 to absorb the impact force during the driving of the vehicle and support the weight of the vehicle body.

[0061] As shown in Figure 2 The piston rod 20 includes a rod body 21 and a mounting portion 22 arranged below the rod body 21. The shock absorber is mounted on the wheel assembly of the vehicle through the mounting portion 22. The resilient return member 50 is arranged on an upper spring seat 52 on the oil storage cylinder 12, a lower spring seat 53 on the mounting portion 22, and a spring 51 arranged between the upper spring seat 52 and the lower spring seat 53. The upper spring seat 52 includes an upper seat body and an upper spring pad supported between the upper seat body and the spring 51. The lower spring seat 53 includes a lower seat body and a lower spring pad supported between the lower seat body and the spring 51.

[0062] The application also provides a vehicle, and an embodiment of the vehicle of the application comprises a vehicle body, a wheel assembly arranged below the vehicle body, and a shock absorber connected between the vehicle body and the wheel assembly, wherein the shock absorber is the shock absorber described above. The shock absorber described above can effectively solve the problem that the installation operation of the shock absorber in the related art is relatively difficult, and the vehicle with the shock absorber described above also has the advantages described above.

[0063] In the description of the utility model, it is understood that the orientation words such as "front, rear, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship generally based on the orientation or position relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, in the absence of the opposite statement, these orientation words do not indicate and imply that the device or element indicated must have a particular orientation or be constructed and operated in a particular orientation, therefore it can not be understood as the limitation of the protection scope of the utility model;The orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0064] For the convenience of description, spatial relative terms such as "on", "above", "upper surface", "upper" and the like can be used herein to describe the spatial positional relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "on" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0065] In addition, it should be noted that the use of "first", "second" and the like to define parts is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, and therefore can not be understood as the limitation of the protection scope of the utility model.

[0066] The above only describes the preferred embodiments of the utility model, and is not used to limit the utility model, and the utility model can have various changes and changes for the person skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A shock absorber characterized by, The shock absorber comprises: a cylinder (10) having a damping chamber (100) in which damping oil is arranged; a piston rod (20) movably arranged in the lower end of the cylinder (10) and extending into the damping chamber (100); a piston (30) arranged at the upper end of the piston rod (20) and sealingly cooperating with the inner wall of the damping chamber (100) to divide the damping chamber (100) into a first chamber (101) above the piston (30) and a second chamber (102) below the piston (30); wherein the upper end of the cylinder (10) is used to be connected with the vehicle body of a vehicle, and the lower end of the piston rod (20) is used to be connected with a wheel assembly of the vehicle; the shock absorber further comprises a control structure (40) arranged at the upper end of the cylinder (10), the control structure (40) being in communication with the first chamber (101) and the second chamber (102) to control the damping force value of the shock absorber during compression and recovery.

2. The shock absorber of claim 1, wherein The control structure (40) comprises a mounting seat (41) arranged at the upper end of the cylinder (10) and a control valve (42) arranged on the mounting seat (41), the control valve (42) having a recovery oil passage and a compression oil passage, damping oil in the second chamber (102) being able to flow into the first chamber (101) through the recovery oil passage, and damping oil in the first chamber (101) being able to flow into the second chamber (102) through the compression oil passage.

3. The shock absorber of claim 2, wherein The control valve (42) comprises a recovery valve (421) and a compression valve (422) arranged separately, the recovery oil passage being arranged in the recovery valve (421), and the compression oil passage being arranged in the compression valve (422).

4. The shock absorber of claim 3, wherein The cylinder (10) comprises a working cylinder (11) and an oil storage cylinder (12) arranged in a nested manner, the damping chamber (100) being formed in the working cylinder (11), an oil storage chamber (200) being formed between the working cylinder (11) and the oil storage cylinder (12), the oil storage chamber (200) being in communication with the second chamber (102), the mounting seat (41) being provided with a communication chamber (300) in communication with the first chamber (101), wherein a first end of the recovery oil passage is in communication with the communication chamber (300), and a second end of the recovery oil passage is in communication with the oil storage chamber (200); and / or a first end of the compression oil passage is in communication with the communication chamber (300), and a second end of the compression oil passage is in communication with the oil storage chamber (200).

5. The shock absorber of claim 4 wherein, The control structure (40) further comprises an accumulator (43) arranged on the mounting seat (41), the accumulator (43) having an accumulator chamber (400) and a floating piston (431) arranged in the accumulator chamber (400) and sealingly connected with the inner wall of the accumulator chamber (400), the floating piston (431) dividing the accumulator chamber (400) into a closed third chamber (401) and a fourth chamber (402) in communication with the communication chamber (300), the third chamber (401) being provided with accumulator fluid.

6. The shock absorber of claim 1, wherein The control structure (40) comprises an oil feeding pump (44) having a compression working state and a recovery working state, when the oil feeding pump (44) is in the compression working state, the oil feeding pump (44) pumps the damping oil in the first chamber (101) into the second chamber (102); when the oil feeding pump (44) is in the recovery working state, the oil feeding pump (44) pumps the damping oil in the second chamber (102) into the first chamber (101).

7. The shock absorber of claim 6 wherein, The control structure (40) further comprises a mounting base (41) arranged at the upper end of the cylinder barrel (10), the mounting base (41) is provided with a communication chamber (300) in communication with the first chamber (101), the cylinder barrel (10) comprises a working cylinder (11) and an oil storage cylinder (12) arranged in a nested mode, the damping chamber (100) is formed in the working cylinder (11), an oil storage chamber (200) is formed between the working cylinder (11) and the oil storage cylinder (12), the oil storage chamber (200) is in communication with the second chamber (102), the control structure (40) further comprises a first oil pipe (45) connecting the communication chamber (300) and the oil feeding pump (44) and a second oil pipe (46) connecting the oil storage chamber (200) and the oil feeding pump (44).

8. The shock absorber according to any one of claims 1 to 7, characterized in that The shock absorber further comprises an elastic reset member (50) sleeved outside the cylinder barrel (10) and the piston rod (20), the upper end of the elastic reset member (50) is fixedly connected with the cylinder barrel (10), and the lower end of the elastic reset member (50) is fixedly connected with the piston rod (20).

9. A vehicle comprising a vehicle body, a wheel assembly disposed below the vehicle body, and a shock absorber connected between the vehicle body and the wheel assembly, characterized by, The shock absorber is the shock absorber according to any one of claims 1 to 8.

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